Laboratory of Advanced Materials for Energy and Environment, Université Du Québec à Trois-Rivières (UQTR), 3351, Boul. des Forges, C.P. 500, Trois-Rivières, Québec, G9A 5H7, Canada; Laser Spectroscopy Laboratory, Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
Laser Spectroscopy Laboratory, Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
Chemosphere. 2023 Oct;339:139735. doi: 10.1016/j.chemosphere.2023.139735. Epub 2023 Aug 4.
We report the preparation of Ag nanoparticles functionalized MoS nanoflakes by using the chemical reduction method followed by the hydrothermal method. Field emission scanning electron microscopy and elemental mapping reveals the uniform functionalization of Ag nanoparticles with MoS nanoflakes. High density of Ag plasmonic nanoparticles onto MoS nanoflakes demonstrates tremendously improved charge separation behavior in Ag-MoS nanohybrids. Photodecomposition capability of plasmonic Ag-MoS nanohybrids was explored by the decomposition of industrial pollutant molecules, showing a direct correlation between the Ag content over the MoS surface with their photodecomposition ability. The SERS-based detection profiles of the plasmonic were investigated by the ultra-low detection of MB molecules. The Ag-MoS nanohybrids SERS substrate manifests the detection of MB molecules solution up to a concentration of 10 M with an enhancement factor of 10. In the current study, we proposed and elucidated the probable efficient charge transfer mechanism for improved photocatalytic behavior and SERS-based sensing performance.
我们通过化学还原法和水热法制备了 Ag 纳米颗粒功能化的 MoS 纳米片。场发射扫描电子显微镜和元素映射揭示了 Ag 纳米颗粒在 MoS 纳米片上的均匀功能化。高密度的 Ag 等离子体纳米颗粒在 MoS 纳米片上展示了在 Ag-MoS 纳米杂化物中极大地改善的电荷分离行为。通过工业污染物分子的分解探索了等离子体 Ag-MoS 纳米杂化物的光分解能力，表明 Ag 在 MoS 表面上的含量与其光分解能力之间存在直接相关性。通过超痕量检测 MB 分子研究了等离子体的 SERS 检测谱。Ag-MoS 纳米杂化物 SERS 基底表现出对 MB 分子溶液的检测，其浓度高达 10-6 M，增强因子为 10。在本研究中，我们提出并阐明了改善光催化行为和基于 SERS 的传感性能的可能有效的电荷转移机制。
